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Finding the Fourth Proportional to 28,872.86, 39,842.89 and 16,935.28

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Solution

The fourth proportional to 28,872.86, 39,842.89 and 16,935.28 is: 23,369.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,872.86 : 39,842.89 = 16,935.28 : x
  2. Step 2: Convert to fraction form
    28,872.86/39,842.89 = 16,935.28/x
  3. Step 3: Cross multiply
    28,872.86x = 39,842.89 × 16,935.28
  4. Step 4: Simplify right side
    28,872.86x = 674,750,356.21
  5. Step 5: Solve for x
    x = 674,750,356.21/28,872.86
  6. Step 6: Final answer
    x = 23,369.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.